[PATCH 2/2] USB: OHCI: make ohci-pxa27x a separate driver
Manjunath Goudar
manjunath.goudar at linaro.org
Thu Jul 4 13:16:27 EDT 2013
Separate the OHCI pxa27x/pxa3xx host controller driver from
ohci-hcd host code so that it can be built as a separate driver
module. This work is part of enabling multi-platform kernels on
ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar at linaro.org>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Greg KH <greg at kroah.com>
Cc: Alan Stern <stern at rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Kconfig | 8 +++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-hcd.c | 5 --
drivers/usb/host/ohci-pxa27x.c | 154 ++++++++++++++++------------------------
4 files changed, 72 insertions(+), 96 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 35c7001..f6fefa2 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -422,6 +422,14 @@ config USB_OHCI_HCD_EP93XX
Enables support for the on-chip OHCI controller on
EP93XX chips.
+config USB_OHCI_HCD_PXA27X
+ tristate "Support for PXA27X/PXA3XX on-chip OHCI USB controller"
+ depends on USB_OHCI_HCD && ARCH_PXA
+ default y
+ ---help---
+ Enables support for the on-chip OHCI controller on
+ PXA27X/PXA3XX chips.
+
config USB_OHCI_HCD_AT91
tristate "Support for Atmel on-chip OHCI USB controller"
depends on USB_OHCI_HCD && ARCH_AT91
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 3fee3ea..8b7fa89 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_USB_OHCI_HCD_S3CXXXX) += ohci-s3c2410.o
obj-$(CONFIG_USB_OHCI_HCD_LPC32XX) += ohci-nxp.o
obj-$(CONFIG_USB_OHCI_HCD_DA8XX) += ohci-da8xx.o
obj-$(CONFIG_USB_OHCI_HCD_EP93XX) += ohci-ep93xx.o
+obj-$(CONFIG_USB_OHCI_HCD_PXA27X) += ohci-pxa27x.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 3f46cff..f601dde 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1184,11 +1184,6 @@ MODULE_LICENSE ("GPL");
#define SA1111_DRIVER ohci_hcd_sa1111_driver
#endif
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
-#include "ohci-pxa27x.c"
-#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
-#endif
-
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF
#include "ohci-ppc-of.c"
#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 5fb91f1..791e2b5 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -19,15 +19,26 @@
* This file is licenced under the GPL.
*/
-#include <linux/device.h>
-#include <linux/signal.h>
-#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
-#include <mach/hardware.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>
#include <linux/platform_data/usb-pxa3xx-ulpi.h>
+#include <linux/platform_device.h>
+#include <linux/signal.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/otg.h>
+
+#include <mach/hardware.h>
+
+#include "ohci.h"
+
+#define DRIVER_DESC "OHCI PXA27X driver"
/*
* UHC: USB Host Controller (OHCI-like) register definitions
@@ -101,11 +112,11 @@
#define PXA_UHC_MAX_PORTNUM 3
-struct pxa27x_ohci {
- /* must be 1st member here for hcd_to_ohci() to work */
- struct ohci_hcd ohci;
+static const char hcd_name[] = "ohci-pxa27x";
- struct device *dev;
+static struct hc_driver __read_mostly ohci_pxa27x_hc_driver;
+
+struct pxa27x_ohci {
struct clk *clk;
void __iomem *mmio_base;
};
@@ -154,8 +165,6 @@ static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *ohci, int mode)
return 0;
}
-extern int usb_disabled(void);
-
/*-------------------------------------------------------------------------*/
static inline void pxa27x_setup_hc(struct pxa27x_ohci *ohci,
@@ -218,6 +227,7 @@ static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
int retval = 0;
struct pxaohci_platform_data *inf;
uint32_t uhchr;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
inf = dev->platform_data;
@@ -240,7 +250,7 @@ static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
return retval;
if (cpu_is_pxa3xx())
- pxa3xx_u2d_start_hc(&ohci_to_hcd(&ohci->ohci)->self);
+ pxa3xx_u2d_start_hc(&hcd->self);
uhchr = __raw_readl(ohci->mmio_base + UHCHR) & ~UHCHR_SSE;
__raw_writel(uhchr, ohci->mmio_base + UHCHR);
@@ -254,12 +264,13 @@ static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
static void pxa27x_stop_hc(struct pxa27x_ohci *ohci, struct device *dev)
{
struct pxaohci_platform_data *inf;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
uint32_t uhccoms;
inf = dev->platform_data;
if (cpu_is_pxa3xx())
- pxa3xx_u2d_stop_hc(&ohci_to_hcd(&ohci->ohci)->self);
+ pxa3xx_u2d_stop_hc(&hcd->self);
if (inf->exit)
inf->exit(dev);
@@ -357,6 +368,7 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
struct usb_hcd *hcd;
struct pxaohci_platform_data *inf;
struct pxa27x_ohci *ohci;
+ struct ohci_hcd *pxaohci;
struct resource *r;
struct clk *usb_clk;
@@ -410,7 +422,6 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
/* initialize "struct pxa27x_ohci" */
ohci = (struct pxa27x_ohci *)hcd_to_ohci(hcd);
- ohci->dev = &pdev->dev;
ohci->clk = usb_clk;
ohci->mmio_base = (void __iomem *)hcd->regs;
@@ -425,7 +436,13 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
if (inf->power_budget)
hcd->power_budget = inf->power_budget;
- ohci_hcd_init(hcd_to_ohci(hcd));
+ pxaohci = hcd_to_ohci(hcd);
+ pxaohci->next_statechange = jiffies;
+ spin_lock_init(&pxaohci->lock);
+ INIT_LIST_HEAD(&pxaohci->pending);
+
+ /* The value of NDP in roothub_a is incorrect on this hardware */
+ pxaohci->num_ports = 3;
retval = usb_add_hcd(hcd, irq, 0);
if (retval == 0)
@@ -471,76 +488,6 @@ void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
/*-------------------------------------------------------------------------*/
-static int
-ohci_pxa27x_start (struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
- ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
-
- /* The value of NDP in roothub_a is incorrect on this hardware */
- ohci->num_ports = 3;
-
- if ((ret = ohci_init(ohci)) < 0)
- return ret;
-
- if ((ret = ohci_run (ohci)) < 0) {
- dev_err(hcd->self.controller, "can't start %s",
- hcd->self.bus_name);
- ohci_stop (hcd);
- return ret;
- }
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static const struct hc_driver ohci_pxa27x_hc_driver = {
- .description = hcd_name,
- .product_desc = "PXA27x OHCI",
- .hcd_priv_size = sizeof(struct pxa27x_ohci),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_USB11 | HCD_MEMORY,
-
- /*
- * basic lifecycle operations
- */
- .start = ohci_pxa27x_start,
- .stop = ohci_stop,
- .shutdown = ohci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ohci_urb_enqueue,
- .urb_dequeue = ohci_urb_dequeue,
- .endpoint_disable = ohci_endpoint_disable,
-
- /*
- * scheduling support
- */
- .get_frame_number = ohci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ohci_hub_status_data,
- .hub_control = ohci_hub_control,
-#ifdef CONFIG_PM
- .bus_suspend = ohci_bus_suspend,
- .bus_resume = ohci_bus_resume,
-#endif
- .start_port_reset = ohci_start_port_reset,
-};
-
-/*-------------------------------------------------------------------------*/
-
static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
{
pr_debug ("In ohci_hcd_pxa27x_drv_probe");
@@ -565,11 +512,13 @@ static int ohci_hcd_pxa27x_drv_suspend(struct device *dev)
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
bool do_wakeup = device_may_wakeup(dev);
+ struct ohci_hcd *pxaohci = hcd_to_ohci(hcd);
int ret;
- if (time_before(jiffies, ohci->ohci.next_statechange))
+ if (time_before(jiffies, pxaohci->next_statechange))
msleep(5);
- ohci->ohci.next_statechange = jiffies;
+
+ pxaohci->next_statechange = jiffies;
ret = ohci_suspend(hcd, do_wakeup);
if (ret)
@@ -584,11 +533,13 @@ static int ohci_hcd_pxa27x_drv_resume(struct device *dev)
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
struct pxaohci_platform_data *inf = dev->platform_data;
+ struct ohci_hcd *pxaohci = hcd_to_ohci(hcd);
int status;
- if (time_before(jiffies, ohci->ohci.next_statechange))
+ if (time_before(jiffies, pxaohci->next_statechange))
msleep(5);
- ohci->ohci.next_statechange = jiffies;
+
+ pxaohci->next_statechange = jiffies;
if ((status = pxa27x_start_hc(ohci, dev)) < 0)
return status;
@@ -606,9 +557,6 @@ static const struct dev_pm_ops ohci_hcd_pxa27x_pm_ops = {
};
#endif
-/* work with hotplug and coldplug */
-MODULE_ALIAS("platform:pxa27x-ohci");
-
static struct platform_driver ohci_hcd_pxa27x_driver = {
.probe = ohci_hcd_pxa27x_drv_probe,
.remove = ohci_hcd_pxa27x_drv_remove,
@@ -623,3 +571,27 @@ static struct platform_driver ohci_hcd_pxa27x_driver = {
},
};
+static const struct ohci_driver_overrides pxa27x_overrides __initconst = {
+ .extra_priv_size = sizeof(struct pxa27x_ohci),
+};
+
+static int __init ohci_pxa27x_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+ ohci_init_driver(&ohci_pxa27x_hc_driver, &pxa27x_overrides);
+ return platform_driver_register(&ohci_hcd_pxa27x_driver);
+}
+module_init(ohci_pxa27x_init);
+
+static void __exit ohci_pxa27x_cleanup(void)
+{
+ platform_driver_unregister(&ohci_hcd_pxa27x_driver);
+}
+module_exit(ohci_pxa27x_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa27x-ohci");
--
1.7.9.5
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